Phoenix Contact 1859603 Terminal Block Header - Equivalent & Substitute Parts

Part Overview

The Phoenix Contact 1859603 is an 11-position terminal block header with male pins, shrouded on four sides, featuring 0.200" (5.08mm) pitch vertical through-hole mounting. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Terminal block headers of this configuration are used in industrial control systems, power distribution modules, and signal interconnection applications where reliable press-fit termination and high voltage isolation are required.

Substiute Parts

1859603

Phoenix ContactIn Stock: 8991859603 Datasheet

Current PartRFQ

1755820

Phoenix ContactIn Stock: 16271755820 Datasheet

SimilarRFQ

1955947

Phoenix ContactIn Stock: 10581955947 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for terminal block headers is determined by strict alignment of electrical and mechanical parameters. The following criteria establish functional equivalence:

Critical Parameters for Substitution:

• Number of positions: 11 (exact match required)
• Pitch: 0.200" (5.08mm) (exact match required)
• Header orientation: Vertical (exact match required)
• Type: Header, Male Pins, Shrouded (4 Side) (exact match required)
• Mounting type: Through Hole (exact match required)
• Insulation height: 0.472" (12.00mm) (exact match required)

Electrical Parameters (Minimum Requirements):

• Current rating: minimum 12A IEC
• Voltage rating: minimum 300V UL
• Material flammability: UL94 V-0

Acceptable Variations:

• Termination style: Press-fit or solder acceptable (different assembly methods)
• Housing material: PBT, Polyamide (PA), or Liquid Crystal Polymer (LCP) acceptable
• Contact tail length: minor variations acceptable if PCB footprint accommodates
• Voltage rating: higher ratings acceptable (backward compatible)
• Product status: active preferred over obsolete

The identified substitute parts (1755820 and 1955947) meet all critical parameters and electrical requirements, with variations only in termination method, housing material, and voltage ratings—all of which are acceptable for functional substitution.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Preferred):

Phoenix Contact 1755820 is the primary substitute for 1859603. Both components share identical mechanical dimensions (11 positions, 5.08mm pitch, 0.154" contact tail length, 0.472" insulation height) and electrical ratings (12A IEC, 300V UL). The transition from press-fit to solder termination requires PCB assembly process modification but provides superior mechanical reliability in high-vibration environments. Housing material change from PBT to Polyamide (PA) maintains UL94 V-0 flammability compliance. Part 1755820 is active status with higher IEC voltage rating (630V vs. 320V), providing enhanced margin for transient overvoltage conditions.

Alternative Substitute:

Phoenix Contact 1955947 meets all critical substitution parameters with the following considerations: housing material is Liquid Crystal Polymer (LCP), which provides superior thermal and chemical resistance compared to PBT or PA. Contact tail length is reduced to 0.102" (2.60mm), requiring PCB footprint verification before implementation. UL current rating is 10A (versus 12A for main part and 1755820), which may be limiting in applications requiring full 12A capacity. IEC voltage rating of 400V exceeds the original 320V specification. This part is suitable for applications where thermal performance or chemical resistance is a design requirement.

Compliance Considerations:

All substitute parts maintain UL94 V-0 flammability compliance and RoHS compliance status. Part 1755820 carries ROHS3 designation, indicating compliance with the most current RoHS directive iteration. Both substitutes are active products with established supply chains, eliminating obsolescence risk associated with the original 1859603.

Frequently Asked Questions (FAQ)

Q: Can 1755820 be used as a direct replacement for 1859603 in existing designs?

A: Yes, 1755820 is mechanically and electrically compatible. The primary difference is termination method: 1859603 uses press-fit termination while 1755820 requires solder attachment. PCB design and assembly process must accommodate solder termination. Mechanical footprint is identical.

Q: What is the difference between press-fit and solder termination?

A: Press-fit termination (1859603) uses mechanical compression to secure the component to the PCB without solder. Solder termination (1755820, 1955947) requires thermal bonding via solder reflow or wave soldering. Solder termination provides higher mechanical strength and is preferred for high-vibration applications. Press-fit termination allows faster assembly and rework capability.

Q: Is 1955947 suitable for high-temperature applications?

A: The provided specifications do not include operating temperature data for any of these components. Housing material composition (LCP in 1955947) suggests enhanced thermal performance compared to PBT or PA, but specific temperature ratings are not provided in the technical parameters.

Q: Can I use 1955947 if my application requires 12A current capacity?

A: 1955947 has a UL current rating of 10A, which is below the 12A requirement of the original 1859603. IEC rating is 12A per position. Application of this part depends on whether UL or IEC standards govern your design requirements. Consult your design standards documentation.

Q: What is the difference in contact tail length between 1755820 and 1955947?

A: 1755820 has contact tail length of 0.154" (3.90mm), identical to the original 1859603. 1955947 has reduced contact tail length of 0.102" (2.60mm). This difference affects PCB hole depth and plating requirements. Verify PCB design accommodates the shorter tail length before selecting 1955947.

Q: Are all three parts RoHS compliant?

A: Yes. 1859603 and 1955947 are RoHS Compliant. 1755820 is ROHS3 Compliant, which represents compliance with the most current RoHS directive. All three parts meet RoHS requirements.

Q: What is the voltage rating difference between these parts?

A: IEC voltage ratings vary: 1859603 (320V), 1755820 (630V), 1955947 (400V). UL voltage rating is 300V for all three parts. Higher IEC ratings provide additional margin for transient overvoltage but do not affect UL compliance. Select based on your application's voltage requirements and applicable standards.